Trial Wavefunctions for the Goldstone Mode in v=1/2+1/2 Quantum Hall Bilayers
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Authors
Moller, G
Simon, SH
Abstract
jats:pBased on the known physics of the excitonic superfluid or 111 state of the quantum Hall bilayer, we create a simple trial wavefunction ansatz for constructing a low-energy branch of (Goldstone) excitations by taking the overall ground state and boosting one layer with respect to the other. This ansatz works extremely well for any interlayer spacing. For small , this is simply the physics of the Goldstone mode, whereas for large , this is a reflection of composite fermion physics. We find hints that certain aspects of composite fermion physics persist to low whereas certain aspects of Goldstone mode physics persist to high . Using these results, we show nonmonotonic behavior of the Goldstone mode velocity as a function of .</jats:p>
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Keywords
SPONTANEOUS INTERLAYER COHERENCE, PHASE-TRANSITIONS, SYSTEMS, STATES
Journal Title
ADV COND MATTER PHYS
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Journal ISSN
1687-8108
1687-8124
1687-8124
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Publisher
Hindawi Limited